taberna: here probably a cook-shop with a bad reputation.
 pilleatis fratribus: i.e. Castor and Pollux, who are often represented in ancient art wearing the pilleus. Their temple, usually called that of Castor alone (Suet. Iul. 10), stood on the southern side of the Forum, near its eastern end. From its restoration in 6 A.D., three Corinthian columns still stand with the ancient podium.
 pila: the pillar at the door of each taberna, or shop, that served as a sign-post for advertisement of the goods within; cf. Hor. S. 1.4.71 “nulla taberna meos habeat neque pila libellos” ; Mart. 1.117.10 “contra Caesaris est forum taberna scriptis postibus hinc et inde totis.” Rows of tabernae stood even in the Forum from early times, while the streets of the vicinity abounded with them.
 The first foot of the verse is probably a dactyl; but cf. Intr. 79.
 an: with ellipsis of the verb, the complete idea being nescio centum sitis an ducenti, i.e. ‘a hundred of you, or, for all I care, two hundred’; cf. Cic. Fam. 13.29.4 “non plus duobus an” [i.e. ‘or possibly it was’] tribus mensibus. But cf. Catul. 29.14 “ducenties aut trecenties.”
 sopionibus scribam: i.e. he will scrawl insulting pictures or inscriptions over the house-front, advertising to passers-by the disorderly character of the house, as some dwellings in Pompeii seem to have been treated. sopio is apparently a colloquial word for penis.
 mi: ethical dative.
 capillatis: contrary to the old Roman custom, young city fops of the day affected long hair elegantly dressed as well as beards (v. 19); cf. Cic. Catil. 2.10.22 “pexo capillo nitidos aut imberbis aut bene barbatos.”